...

##
## Quota limits
##

# Quota limits are set using "quota_rule" parameters. To get per-user quota
# limits, you can set/override them by returning "quota_rule" extra field
# from userdb. It's also possible to give mailbox-specific limits, for example
# to give additional 100 MB when saving to Trash:

plugin {
  #quota_rule = *:storage=1G
  #quota_rule2 = Trash:storage=+100M

  # LDA/LMTP allows saving the last mail to bring user from under quota to
  # over quota, if the quota doesn't grow too high. Default is to allow as
  # long as quota will stay under 10% above the limit. Also allowed e.g. 10M.
  #quota_grace = 10%%
  # Django : 2014-08-06
  # default: unset
  # jeder User bekommt im 1GB Mailstorage zugewiesen
  quota_rule = *:storage=100K
  # jeder User kann 10k = 10.240 Nachrichten in der INBOX liegen haben
  quota_rule2 = INBOX:messages=+10K
  # jeder User darf im Unterverzeichnis Trash zusätzlich 125 MB haben
  quota_rule3 = INBOX/Trash:storage=+125M
  # der Sent-Ordner wird bei der Bewertung ausgenommen
  quota_rule4 = INBOX/Sent:ignore
  # das Verzeichnis Order darf 25% overquota liegen
  quota_rule5 = INBOX/Archiv:storage=+25%%
  #
  # jeder user darf die Quota-Limitierung einmalig um 10% überschreiten
  quota_grace = 10%%
}